Molding apparatus.



M. J. HEWLETT L H. L. DBMMLER.

MOLDNG APPARATUS.

APPLIOATON FILED 0ST.

Patented Feb. 10, 1914 M. J. HEWLETT a H. L. DBMMLERl MOLDING APPARATUS.

APPLGATION .FILED OGT.5.1908.

1,086,824, A Patented Feb.10,1914L M. J. HEWLETT 2. H. LA DBMMLER.

MOLDING APPARATUS.

APPLXGATION FILED OCT. 5, 1908.

1,086,824. Patented Feb. 10, 1914 6 SHEETS-SHEET 3.

rfz/JTNESSES: Y JNVENTQRS:

M. J. HEWLETT L H. L. DEMMLER. MOLDING APPARATUS.

APPLICATION FILED @015.1908

1,086,824, Patented Feb. 10, 1914.

` /w s SHEETS-SHEET 4.

l Hy

WIVNESSES Y BY ` @07 v AYTQRNVV El. J. HEWLETT a H. L. DEMMLER.

MOLDING APPARATUS.

APPLIGANON ULEB 0015. um

1,086,824. Patented Feb. 10, 191%l dm if INVENTOR'S .1.. lqfml/emyLemmZcr,

49,1%@ ,1, 1 .ff fn# ATTORNEY UNITED STATESl PATENT oFFioE.

)uoLmNG APPARATUS.

.Specification of Letters Patent.

Application filed October 5, 1908. Serial No. 456.320.

Patented Foi). 1o,1914.

To all 11b/wm. 'it may concern Be it known that we, Mannini d. l.li:\\'-Lirr'r and HEX nv L. Dnwiviniu. citizens of the linited States. andresidents ot Kewanec. in the county of Henry and State of Illinois, haveinvented certain new and useful linproveinents in Molding Apparatus. ofwhich the tollowintiy is a specification. reference bcin;r had t-o theaccompanying drawings.

Our invention relates to the moldingl ot' sand or analogous material.either in the? forni of cores or in making molds. and vthe presentapplication has to do particularly with apparatus for so molding sand oranalogous material.

The 'invention relates to a machine in which sand or analogous materialis forced into a flask and packed around or into a paitern by compressedair or other fluid. and in which further packing of the sand oranalogous material is ctl'eifted by jarring the flask byinterinittentliraising the flask and con tents and allowing the same todrop and solidify by gravity coupled with theshock itl receives on beingarrested.

A further objectot the invention is to providc an apparatus of thischaracter, equipped with fillingjdevices adapt/ed to be brought into andout of charging relation with the flask. aud capable of enabling thelatter to be filled and conveniently removed after filling. thereby'vmaking a place for its sin cessor and enablingr the. machine to liecon-- venientlv operated.

ll'it'n these and .other objects in view. the

invention consists in the construction :ind novel combination of partshereinafter tiillv described.l illustrated in the accompaiiyn,"rdrawings, and pointed out in the clainis hereto appended; it beingunderstood that izii'icus changes in the torni. proportioiusize andminor details ot construction. within the scope of the claims, may beresorted to without departing from the spirit or sacriticing' any of theadvantages of the invention.

ln the drawingst--lf`igure l is a vertical longitudinal sectional viewon the line. 2---2 of Fig. -lshoiving` a iiioldnig apparatus. coniictcdiii accordance with this invention.

is :i plan view ot the apparatus. is a side elevation of the saine. Fig.4 is a side elevation of the eccentric locking' mechanism. Fig. 5 is aplairtview ot the saine. Fig. G is a front elevation of the moldingapparatus. Figs-t and 8 are fle- Fig. 1

` tail views. illustrating the construction of the guiding means for'the sand frame. Fig. is a central vertical sectional view on the linet`i-9 of Fig. 1, illustrating the arrange- 3 nient of' vthe parts priorto clamping the sand reservoir on the flask. Fig. 10 is a vertical gsectional view similar to Fig. t), but showing the flask clampedand-ready for filling. {"ig. 1l is a vertical sectional view, thestripping plate being supported by the adjustable postT the niaincylinder being lowered and the carriage being moved back to permit thereservoir to be lled with sand.

Like numerals of reference designate corresponding parts Iin all thefigures of thev drawings.. l

the preferred embodiment. of the inveiit'ion. 2 designates a base plate,forming a .support for a hollow cushioning cylinder 3. which alsoconstitutes means for drawn/ig a pattern bv lowering a verticallymovable piston 5. The verticallyv movable piston 5 provided with packingrings 4. and it rcceives a fixed vertical tube (l, forming a port whichleads to a nain cylinder 7. The tub-c, 6 is provided adjacent to itsupper end with packing rings S to make a fluid tight joint for thesliding piston 5. A soft packinif t) is provided to cushion t-heie-aetion of the sliding piston 5,A and blocks 10 of wood, or other softmaterial are employed to avoid abia- K` sure from Contact. The maincylinder 'T is equipped at its upper end with a platen, preferablyformed integral with the cylinder 1 and adapted to receive a pattern 13,or a set l of patterns. which pattern 13 is carried upward in a verticaldirection through a sti-ippin plateI 12. The stripping plate 12. which iis designed to be provided with the usual opening 12 or openings for thepassage of f the patterns7 is adapted to receive a flask 14. and issupported bv adjustable posts l5. as clearly illustrated in l"ig. 11 ofthe accompauving drawings. 'l`lie stripping plate is i supported by theposts before the pattern l 13 is carried upward by the main cylinder.

whichnraises the strippingplate and .sup, ports the same above the postsl5. and when thev cylinder is moved downward to draw the pattern. thestripping` plate is lowered to tlie posts 15 and is supported by thelatter.

1T designates a horizontal pressure head provided at opposite' sides ofthe apparatus i with depending arms 18, preferably formed Tn tbeaccompanying drawings illust ating integral with the pressure head 17and provided with inwardly extending horizontal .projections 19 toengage the platen 11. The depending arms of the pressure head are alsoequipped with rollers orwheels 20, 1ocated at the outer face of the saidarms 18 and arranged to run on horizontal tracks 16 to facilitate thehorizontal movement of the pressure head 17, Which carries a verticalcylinder 21, suitably attached to the pressure head 17. The arms 18 haveenlarged portions to which the said rollers or wheels 20 are secured,and a car`51 is thereby formed for carrying the reservoir 25 to and fromthe sand supplying means. Operating within the cylinder 21 is a pistonhead 22. having a piston rod 23 connected at its upper end withthepiston head and at its lower end with a cross head 24. The reservoir25 is open at the top and has perforations 26 in its bottom. Admissionof compressed air to the reservoir 25 through a supply port 30 iscontrolled by a piston valve 27, mounted in a valve chamber 28 in thecross head 24 and provided with pack- .ing rings 29. The supply port 30may be connected with any suitable source of supply, and the pressurewit-hin the reservoir is exhausted by means of a valve 32, held closedby fluid pressure in a cylinder 33, acting against a piston 34, which isattached to the cross head 24. This valve is for the purpose ofexhausting lluid pressure from the sand reservoir 25 after the mold hasbeen completed and the valve 27 has been closed.

Attached to the head of the cylinder 21 are bearings 75 in which isjournaled an eccentric shaft 35, pr'ovided with opposite shoulders 36and equipped with a crank 37, attached to one end of the shaft. One ofthe shoulders 36 coperates with a fixed stop 36, located atv one side ofthe shaft 35 in the path of the coperating shoulder 36, as clearly shownin Fig. 4 of the drawings, and the other shoulder is engaged by a piv-`ot-ed pawl 38, mounted on a pinA 39 and pressed into engagement withthe said shoulder 36 b v a spring 40, and adapted to be withdrawn fromsuch engagement by a'cord 41. attached t0 the pawl 38 and adapted todisengage the same from the co-acting shoulder to permit the shaft 3 5to rotate. The shoulder 36, stop 36a and pawl 38 hold the eccentricshaft in a given position during'the initial filling of the ilask, andthe rotary movement of the shaft allows the reservoir 25 to descendduring the jarring operation, as hereinafter fully explained. The pistonrod 23 is provided with 'an extension 42, having an elliptical loop 42,which receives a crankV bend of the eccentric shaft 35. The crank bendis adapted to support the piston rod 23 and the parts 'carried thereby,and when the eccentric shaft 35 is partially rotated, the crank bendswings downward antLpermits the said downward movement of the reservoir25.

The reservoir 25 is surrounded by a band 43 having a relatively slidablemovement on the outside of the reservoir, and connected with the same bymeans of pins 44, projecting from `the reservoir and extending throughvertical slots 44a in the band. The band is I normally held in itslowermost position with the pins at the upper ends of the vertical slotsby means of springs 45, interposed between the upper edge of the band 43and projectingr flange 46 extending horizontally from the reservoir 25.

Supported in an elevated position is a` supply hopper 47,`adapted tocontain sand or analogous material, which is delivered to the reservoir25 by a slidable b'ottomless drawer 48, adapted to be pushed forward onguides 49 by a fluid pressure controlled piston 50 of a cylinder 70 todeliver a charge of sand, or other material into the reservoir 25. Thecar 51 travels on the tracks 16 and Ais actuated by a fluid controlledpiston 52 of a cylinder 53. The base 2 also supports a valve casing 54having a supply port 55, and provided with a valve seat 56 and receivinga valve 57, provided with suitable packing rings 58. The supply port isadapted to furnish fluid pressure from'any suitable source of supply,and the Valve 57 is lifted by a compression spring 59, seated upon thevalve casing and interposed between the same and a washer 60, which isconnected with the stem of the Valve 57. The casing of the valve 57 isconnected by a port 61 with the main cylinder 7. The` port 61 consistsof apassage extending through the valve casing 54 and through the baseat a point beneath the lower end of the vertical tube' 6. The base 2isprovided ivith a supply port 63, consisting of a passage communicatingwith the cushioning cylinder 3.

The sand hoppei` is equipped with -a proi jection 65, consisting of anarmtextending from the path of and adapted to ,engage the vc'rimlr'37 ofthe eccentric shaft 35. Compressed air or other acriform fluid issupplied to the cyl? inders 53. 21 and 70 by supply pipes 66, 66a and66". andthe cross head 24, which has a port 68, is provided with a valeseat 69 to co-act with the piston valve 27.v The reservoir 25, fromwhich compressed air is exhausted through the. port 62, is guided byprojections 78, extending from the reservoir 25 and operating in guides79 on the arms 18. The projections 78a of the sand band 43 are supportedby compression springs 80, which raisethe band 43 and the reservoir toclear the. flask. A fluid pressure chest 73 in the cross head 24 issupplied from any suitable source of fluid pressure by a pipe or port30.

san'd hopper and arranged xinl'the- T he air is exhausted from the maincylinder through an exhaust port 74 of the valve casingA 54, and asupply pipe 76 furnishes fluid pressure to the cylinder 33. The severalpipe connections may he connected to a hose leading to any sui-tableoperating valves so as to furnish tluid pressure from a common `source`of supply. The cross head 24 is provided at the bottom with a perforatedplate 81 for the purposemf distributing the lluid pressure The cylinder28 `is provided with a port 32. through which the pressure is suppliedand exhausted.

To operate the molding' apparatus. fluid pressure Vis applied throughthe pipe to the cushioning c vlinde 3, lifting the sliding piston."ifrom its lowermost position at the lower end of thecylinder 3 andraising the pattern ll-lto the startingr position. A flask is'thenplaced on the stripping plate and the, hopper 4T'is lled with sand or'analogous imiterial. By moving; the car to the right to a positionadjacent. to the hopper 4, the drawei 48 is beneath the hopper and theshelf 4S) forms a temporary 'bottom for the said drawer. which at thistime,.is filled with sand from the hopper. The drawer is then nioved tothe left. so that its bottom will register with the openingat the topofthe reservoir 25, an extension 4S of the drawer mea nwhile closinglthe bottom of the hopper. The drawer is then moved to the right toreturn it to its initial position beneath the hopper. and the car ismoved to the left to position it over the main cylinder 7. Fluidpressure is supplied to the back of the piston of the cylinder T0.pushing the hottomless drawer or reservoir 48 over the reservoir 25. IFluid pressure is then applied Ato the hack of the piston ot thecylinder' 53; ,causing the ca 51 to move over the flask 14. By applyingfluid pressure to the top of the cylinder 21. the cross head 24 forms acover for the f reservoir 25 land rests thereon and causes the idependingr arms 18 to rise. liftingr the car 51 and causing theprojections 19 of the arms 18 to engage the. platen. and thus clamp thereservoir 25 over the flask formimer a closed .receptacle for theintroduction of sand. or

other filling;r material. The arms and the inwardly extendingprojections llt thereof eonstitute fluid controlled means for lockiinf.rthc flask or core box to tht` said reservoir Q5 i and the means forintroducing sand under fluid pressure into tht`v said flask or core box.rl`he piston i?? is arrested in its downward i travel by the eccentricshaft 37. the eccentric or crank portion of which is supported in itsuppermost position by thtl paw] 3Q. When the tlasl; is thus clamped andready for filling. the strippingr plate with the flask thereon issupported hy the main cylinder T: the hand 43 rests upon the upper edgeof the tlaslt. and the sand reservoir is supported t by the said band 43through the pin kand slot I wnneetion and the said springs 45. This willpermit the lifting of the carriage 51 and the clamping of the flask inthe manner before explained. Fluid pressure is then exhausted from thetop of the valve 2'?, which rises from its seat 69 admitting fluidpressure from the supply pipe 30 through the port (58 into the reservoir25, forcing the sand or other analogous material through theperforatiousin the bottom of the reservoir Q5 ,and fillingr the flask 14.r The sandband 43 acts as an extension of the flask to .admit further pakking ofthe sand b v vibration. The pawl 38 is withdrawn, allowing the crank oreeoentrie to rotate and move dowmvardly from the upper end of the:I loop42 to permit the sand reservoir to descend in the further packingr ofthesand through the jarringof the flask. Fluid presi sure is suppliedthrough the port of the valve casing 54 and through the port 61 to themain cylinder i", thereby causing the platento rise. As the platen movesupward. the spring 59 eats the valve 57 euttintr otll the fluid to the port (il and connecting the said port (l1 to the exhaust port 74.exhanstiingr the Ipressure within the main cylinder and causingr theplaten to' fall. The main cylinder is arrested in its downward movementby the piston 5 and the. platen in fallin;T engages the cap a over thevalve 5T. unseating said valve and reestablishingrcommunication betweenthe supply port 55 and the port ttl. By this construction the maincylinder autonmtieally raised. and dropped. thereby producingr a jarringof thc flask and thel contents thereof. and the main cylinder T willl econtinuously rceiproeatcd or vihrated in this manner" as lon;r as fluidpressure is supplied to theport. 55. 'l`hc valve 5T reciprocatesultomatically and the platen is continuously operated until thc mold iscompleted. B v applying tluid prt-ssurc over the valvev "2T and seatingthe same and exhausting: fluid pressure from the cylinder 33. exhaustvalve 3L) is unseated and the fluid pressure is exhausted from thereservoir By exhausting t'luid4 pressure trom the top of the c vllndcr2l. the cross t head 2l is raised and the car ."1 is permitted to returnto the track 16. Fluid pressure is then applied to the forward end ofth(` cylindcr 53 and the car is drawn hack. Fluid pressure is thenexhausted from the cylinder Il and the platen is allowed to drop. leaving thtl strippiupr plat-e 12 supported on the posts l5. andpermittingr the. patterns to lie drawn. 'l`hc sand hand 43 is onlyemployed in cases where an extremely hard mold is required. Ordimirilirmolds can he made of sutlieient strength hy \ibratin; T the flask whilefluid pressure is actingr upon the contents of the reservoir Q5. thus`dispensing with the neceseity of locking the reservoir 25 above the.flask. In such eases the reservoir will be supported directly bythe-fl'ask, and uid pressure applied to the contents of the' reservoirand also to the vibrating mechanism to keep the flask full and tocompensate for the 5 settling of the sand, resulting from the jarring orvibration of the flask. The mold ma)v be finished level in this manner,andl it will be unnecessary to strike ofi' the surplus material as isnecessary with fthe ordinary molding device. The finished mold may nowbe removed and another flask placed on the pattern. t l 1 l Themoldingapparatus ay employed for forming cores or molds lfor any purposefor which they may beb required. l

Having thus fully described our invention, whatwe claim as new anddesire'l to Secure by Letters Patent, is

1. In a molding machine, the combination sand under fluid pressure intosaid ask 'or core box, and fluid controlled means for locking said flaskor corebox into controlled relation to said means for introducing sandunder fluid'pressure into said flask or core box.

2. In a molding machine,'the combination of a flask orl core box, meansfor introducing sand under fluid pressure into said flask or core box,fluid controlled means for locking said flask or core box intocontrolled relation to said means for introducing sand under fluidpressure into said flask or core box, and means for withdrawing apattern or core from said flask or core box.

Il. In a molding machine. the combination of a mold box. means forintroducing sand under fluid pressure into said mold box` fluidcontrolled means for locking said mold box in controlled relation tosaid means for introducing sand uuderuid pressure, and means forchanging thc relative positions of said mold box and said means forintroducing sand' under fluid pressure, for the purpose described. A

4. In a molding machine, the combination sot' a mold box. means` forintroducing sand under fluid pressurehiknto said mold box. fluidcontrolled means for locking said mold box into controlledif-'lation tosaid means l'or introducing sand into said mold box. fluid controlledmeans for withdrawing a pattern or core from `said mold box` and meansfor changing the relative positions of said mold box and said,means forintroducing sand into said mold box. for the purpose described.

5. ln a molding machine. the combination of a mold box, means forintroducing sand with fluid pressure. int-o said mold box. fluid vcontrolled means for locking said box in controlled relation with thesaid sand introducing means, and means for exhausting pressure from thesand supplying means.

6. In a molding machine, the combination of a mold box, means forintroducing sand of a flask or core box, means for introducing4 withfluid pressure into said mold box, fluid controlled means for lockingsaid sand introducing means into controlled relation with said mold box,means for 4exhims fluid pressure from said' means for introdue's ingsand into said mold box, and fluid controlled means for withdrawing apattern or core from said sand box.

7. In a molding machine, the combinationflask to-form a mold, means forrechargingrgf said filling means, means for changing therelat'irepositions of said platen and said filling' means, means forsupporting said pla-ten, and fluid controlled means forsupporting saidplaten support.

9. 'In a molding machine, the combination with a flask or core box,means for support` ing the same in a relatively fixed position,

fluid controlled means for filling thc flask or core box to forni a moldor core, and means carried by the filling means for engaging witlrthesaid supporting means for locking thcI filling means at. a point abovethe flask or core box.

l0. ln a molding machine, the combination with a flask or core box,means for supporting 'the same in a relatively fixed position. a carprovided with means for engaging thc said supportin means, means carriedby the car for filling the said flask or core box to form a` mold orcore, and means for raising and lowering the car to engage the same withthe supporting means to lock the. filling means at a point above theflask or core box and to release the filling means.

1l. In a molding machine. the combination with a flask or core box,fluid controlli-Pd means' for filling said flask or core box to form amold, means for locking said filling means above said flask. means forreleasing said locking means, and means for compressing said mold. A

l2. ln a molding machine. the combination with a flask or core box.fluid controlled means for filling said flask or core box to forni amold. means for locking .said filling means above said flask or corebox. means for releasing said locking means. and means for\f'ibratingsaid flask or core. box to further compress said mold.

13. In a molding machine. the combina` tion with a flask, fluidcontrolled means for filling said flask to form a mold. means forhold-ing said filling means'in controlled rela.- tion to said flask.and'mcans for vibrating said mold to further compress said mold.

14. In a molding machine, the combiua- Lori-6.324

P :nouns for changing thv .f'llniiw if'milinny I will flank nml unlfilling;v immun. nml

nnwins for drawing n pntei'n.

Y il molding innnhino inulndlng n llink, l :illngrilnblc fluidcontrolled moans for filling l will flask to forni n mold. flnnl.'onfi'ollofl l inmuis foi' Plnnging said filling4 means. nouns fox'hanging the relative punitions of nld flnnk and 51ml fillingr nivnnfl.nnnin loi' dmwinf u palle-ini, :unl nnsins for YiM limiting :nin fleisklo further ooinpi'vswa mill nnilll.

l?. In a molding machine, lnj; ffnmliiininon with n flask, fluidcontrolled inonnl for filling said flask. means for vibrating snillllink und the filling menus, and means for nshionmg said vibratingInsulin.

lB. In a molding machine. the conihinnlion with a flask. fluidcontrnllml means fni filling bald flask to form u mold. moana foriliruiing said flask und the filling means to further compress contentsof sind flask, unil voii' Carried by lli@ car. find al fluid pwssnio'jllinalefr mounted on tho car und haii-ing :i pinion connected willithe.` i-snmvfiin ,will fsylinilei and pislon opel"- nling lio lowci'ille reservoir to lhoflask and mine the uur. l'l om* when raisedengzigiiig with flan zuid vibrating means for holding' hl.- flasktliorullfn and for retaining Irlic reservnir in ponlllnn on lh@ flask.

tf1, In :i nmlfling nnmliine, the voniliinnlion with n ilu flninl(re-niiollurl means foi' filling nhl llnsk in loi'in n mold, means foi'minfin; .inni lllling manna with' felation lo .will flask nml :nouns forfurther vomA prf-wing sniil innld without disturbing tho i'olntinnlwfwnnn the flask :ind the fllling'.;

n'ienns.

ln :i nwlrling machine, the combinatn-.n will] n I'lusk oi'l vom box,means fnr snp'- poxfing said flask or Core box, means for vibrating Suidsupporting means und snifl flank nivoi'o box.. and i'esllientlysnppoi'lod r means foi' sni'ioiling said maling for inppoillng snifl askoi core box.

25. ln a molding machin?, the conibina fion n ilh n flask or mvo box,means foil Slipnppning .smid flask or core box.,l moan for vibratingwill snppoi'tinw innnns uno' Said llniil means to Cushion said vibratingmean i lion, n #sur pio'ln'lfvl with menus, for ungen?- i 1.9. In nmolding machine, thu combinav tion with vibrating mechanism, of a flask"nil-lul by the same2 n cui' movable toward und from the vibratingmoohnnism` :i resem Voir' carried by the cai: and n llnifl pressnrfvylinder mounted nn the mi' find having :i pinfon connected with flici'l ei\i ii. Said 'yliinlei :unl pintni: opninling to imm-i' tin,i'onxivoir fo tho flask land mise lln` l-ni.

20. ln :i molding machine, tlnl comliinnfion nifl vibrating math-anhin.of n tlnk carried by the lsaine, a car nn,- 'nbie towni' und from thevibi'aling mechanism. d reserllusk or vor@ box. und flni Coniolld inmunel'ni' Supporting said moans for snppni'ing will llink of wir@ box.

El. ln n molding machine, the combination will; n fins-k ni com box,means for snppoijting; lho 5min, in n relatively lrfefl posiing.Y thesupporting means, fluid Con'inlled nwnns vni'i'ied lijf llnf cui' forfilling tbe flnSi: nr con box. :nifl means for imparting mlntivo'vmlivnl mowinen tu flic oni. und he filling nwnns finiq engaging thenur with lnlinnn-ming! nimm and looking the fillini.r :infima: nl npoint nbovn the flask or con) box.

.lllilll JACKSON HEWLWP'V. [in SJ inruil L. DEMMLER. n. s.; W ltnwsns:

lil l'liiws. lonnn'i C Molina.

